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UBSAN: shift-out-of-bounds in net/core/gen_estimator.c:83:38
shift exponent -193 is negative
CPU: 0 PID: 8452 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148
 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:395
 est_timer.cold+0xbb/0x12d net/core/gen_estimator.c:83
 call_timer_fn+0x1a5/0x710 kernel/time/timer.c:1417
 expire_timers kernel/time/timer.c:1462 [inline]
 __run_timers+0x6f6/0xb10 kernel/time/timer.c:1731
 run_timer_softirq+0x7d/0x140 kernel/time/timer.c:1744
 __do_softirq+0x2cb/0xad5 kernel/softirq.c:298
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x18a/0x1b0 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0033:0x5a7c57
Code: cc cc cc 48 8b 44 24 08 84 00 48 89 44 24 08 c6 44 24 10 00 e9 9a 31 ff ff cc cc cc cc cc cc cc cc cc cc 48 8b 44 24 08 84 00 <48> 89 44 24 08 48 c7 44 24 10 00 00 00 00 e9 86 31 ff ff cc cc cc
RSP: 002b:000000c00f64c440 EFLAGS: 00000202
RAX: 00000000012492a0 RBX: 000000c0004fc000 RCX: 00000000005a7c50
RDX: 000000c00000c060 RSI: 000000000088f3a0 RDI: 000000c00eac0e50
RBP: 000000c00f64c470 R08: 0000000000000003 R09: 000000c00eac0ec0
R10: 0000000000000038 R11: 0000000000000011 R12: 000000c00eabb890
R13: 000000c00001ddc8 R14: 0000000000b36899 R15: 0000000000000000
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